Caffeine, MagicPrefs
Caffeine: a coffee cup icon which sits in the taskbar. Click it to prevent the screen from going to sleep — great for presentations.
MagicPrefs: small utility for giving more functionality to trackpads or mice. I use it to turn an Apple Magic Mouse into a very good presentation controller, with taps on the top for moving slides forward, backwards and for blanking the screen.
Biting the hand that feeds IT
